Played by Jim Beaver
Ellsworth has spent most of his days prospecting for gold in one part of the country or another, and has managed to scrounge enough, apparently, to cover for his appetite for whores and booze. Despite his somewhat disheveled appearance, Ellsworth is no fool, and he knows exactly how dangerous Swearengen can be; he knows to keep quiet about witnessing Brom Garret's murder. Still, at Bullock's urging, he accepts responsibility for overseeing Alma Garret's claim and proves himself to be extremely knowledgeable about mining. He is also fiercely loyal to Alma and Sofia.